Improvement in step-supports for mill-spindles



J. RUSSELL. Mill Spindle. No. 99,353. Patented Feb. 1, 1870.

@Inventur NJETERS, PHOTD-LTHOGHAPHER. WASHINGTON. D c.

waited Startet JOHN RUSSELL, OF PRAIRIE, MISSOURI.

Letters .Patent No. 99,353, dated February 1, 1870. l

IMPRQVEMENT IN STEP-SUPPORTS FOR. MILL-SPINDLES.

The Schedule referred to in these Lettera Patent and part of the sama Toall whom (it may concern:

Be it known that 1, JOHN RUSSELL, of Prairie, in the county of Clinton,and State of Missouri, have invented a new and useful Improvement inStep-Supports for M-ill-Spindles; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, which willenable others skilled in thel art to `make and use the same, referencebeing had to the accompanying drawings, forming part of thisspecification. A i

This invention relates to improvements in the adjusting devices for thesteps of mill-spindles; and cousistsin the arrangement of the steps inthe top of a vertically-adjustable tube or other sliding support,provided with vertical guides, and working through guideplates, toinsure the vertical position and to prevent rattling, the said supportsbeing mounted on a r'od rising up from the bridge-tree and jointed toit, so that the joint may compensate for the curve described by it, dueto the one end of the bridge-tree being fixed, and the other swingingaround the said fixed point, and the steps may be raised in a rightline.

Figure l represents a side elevation of my improved arrangement, and jFigure 2 represents a sectional elevation of the same, taken on the linex a: of fig. 1.

Similar letters of reference indicate corresponding parts. i l

A represents a'part of the huskframe, and B, the bridge-tree; The stepsfor the spindles are commonly set on these bridge-trees, and, owing tothe curves described by the said steps in 1aisingand turning the freeends by the adjusting-screws C, for raising or lowering the stone, forgrinding coarser or finer, it is impossible tokeep the said spindlesperpendicular to the faces of the bed-stones.

To avoid this diculty, I propose to place the bridgetrees lower down,and introduce the step-supports D, which may consistspreferably ofhollow tubes, on the tops of which, the steps E, of any approvedconstruction, may be xed in `any suitable way, supporting the saidstep-supports on rods F, jointed to ,the bridgetree, and placing them inholes in guideplates fixed to the beamsfH.

I also attach the broad lateral arms I to the sup port D, and providethe vertical adjustable guideplates K to press against the said arms,and to be adjusted exactly perpendicular to the face of the bedstone bythe adjustingfserews L, so as to guide the support properly in Workingup and down, and to prevent it from chattering or rattling against theedges of the plates G, through which it passes.

Lhe plate I, which forms the lateral arms, in this example, passesthrough the tubular support, and rests inside thereof', in the notchedupper end of the rod F. f

It will be seen, that by this arrangement, no matter how much thebridge-tree is raised, the foot of the spindle, resting in the step E,will always rise in a vertical line,or in a line perpendicular to theface ofthe bed-stone, as it may be without any deviation.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- The combinationof the hollow tubular support D, jointed rods F, lateral arms I,guide-plates G K, and adjusting-screws L, with the step E, all arrangedas set forth, and operating to retain the spindles always in a trueperpendicular position with respect to the bed-stone.

JOHN RUSSELL.

Witnesses:

EWEN O. HALE, J. W. BOWLs.

